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/*

 * DLCI/FRAD    Definitions for Frame Relay Access Devices.  DLCI devices are

 *              created for each DLCI associated with a FRAD.  The FRAD driver

 *              is not truly a network device, but the lower level device

 *              handler.  This allows other FRAD manufacturers to use the DLCI

 *              code, including its RFC1490 encapsulation alongside the current

 *              implementation for the Sangoma cards.

 *

 * Version:     @(#)if_ifrad.h  0.15    31 Mar 96

 *

 * Author:      Mike McLagan <mike.mclagan@linux.org>

 *

 * Changes:

 *              0.15    Mike McLagan    changed structure defs (packed)

 *                                      re-arranged flags

 *                                      added DLCI_RET vars

 *

 *              This program is free software; you can redistribute it and/or

 *              modify it under the terms of the GNU General Public License

 *              as published by the Free Software Foundation; either version

 *              2 of the License, or (at your option) any later version.

 */

#ifndef _FRAD_H_

#define _FRAD_H_

#include <linux/config.h>

#include <linux/if.h>

/* Structures and constants associated with the DLCI device driver */

struct dlci_add

{

   char  devname[IFNAMSIZ];

   short dlci;

};

#define DLCI_GET_CONF   (SIOCDEVPRIVATE + 2)

#define DLCI_SET_CONF   (SIOCDEVPRIVATE + 3)

/*

 * These are related to the Sangoma SDLA and should remain in order.

 * Code within the SDLA module is based on the specifics of this

 * structure.  Change at your own peril.

 */

struct dlci_conf {

   short flags;

   short CIR_fwd;

   short Bc_fwd;

   short Be_fwd;

   short CIR_bwd;

   short Bc_bwd;

   short Be_bwd;

/* these are part of the status read */

   short Tc_fwd;

   short Tc_bwd;

   short Tf_max;

   short Tb_max;

/* add any new fields here above is a mirror of sdla_dlci_conf */

};

#define DLCI_GET_SLAVE  (SIOCDEVPRIVATE + 4)

/* configuration flags for DLCI */

#define DLCI_IGNORE_CIR_OUT     0x0001

#define DLCI_ACCOUNT_CIR_IN     0x0002

#define DLCI_BUFFER_IF          0x0008

#define DLCI_VALID_FLAGS        0x000B

/* FRAD driver uses these to indicate what it did with packet */

#define DLCI_RET_OK             0x00

#define DLCI_RET_ERR            0x01

#define DLCI_RET_DROP           0x02

/* defines for the actual Frame Relay hardware */

#define FRAD_GET_CONF   (SIOCDEVPRIVATE)

#define FRAD_SET_CONF   (SIOCDEVPRIVATE + 1)

#define FRAD_LAST_IOCTL FRAD_SET_CONF

/*

 * Based on the setup for the Sangoma SDLA.  If changes are

 * necessary to this structure, a routine will need to be

 * added to that module to copy fields.

 */

struct frad_conf

{

   short station;

   short flags;

   short kbaud;

   short clocking;

   short mtu;

   short T391;

   short T392;

   short N391;

   short N392;

   short N393;

   short CIR_fwd;

   short Bc_fwd;

   short Be_fwd;

   short CIR_bwd;

   short Bc_bwd;

   short Be_bwd;

/* Add new fields here, above is a mirror of the sdla_conf */

};

#define FRAD_STATION_CPE        0x0000

#define FRAD_STATION_NODE       0x0001

#define FRAD_TX_IGNORE_CIR      0x0001

#define FRAD_RX_ACCOUNT_CIR     0x0002

#define FRAD_DROP_ABORTED       0x0004

#define FRAD_BUFFERIF           0x0008

#define FRAD_STATS              0x0010

#define FRAD_MCI                0x0100

#define FRAD_AUTODLCI           0x8000

#define FRAD_VALID_FLAGS        0x811F

#define FRAD_CLOCK_INT          0x0001

#define FRAD_CLOCK_EXT          0x0000

#ifdef __KERNEL__

/* these are the fields of an RFC 1490 header */

struct frhdr

{

   unsigned char  control       __attribute__((packed));

   /* for IP packets, this can be the NLPID */

   unsigned char  pad           __attribute__((packed));

   unsigned char  NLPID         __attribute__((packed));

   unsigned char  OUI[3]        __attribute__((packed));

   unsigned short PID           __attribute__((packed));

#define IP_NLPID pad 

};

/* see RFC 1490 for the definition of the following */

#define FRAD_I_UI               0x03

#define FRAD_P_PADDING          0x00

#define FRAD_P_Q933             0x08

#define FRAD_P_SNAP             0x80

#define FRAD_P_CLNP             0x81

#define FRAD_P_IP               0xCC

struct dlci_local

{

   struct enet_statistics stats;

   struct device          *slave;

   struct dlci_conf       config;

   int                    configured;

   /* callback function */

   void              (*receive)(struct sk_buff *skb, struct device *);

};

struct frad_local

{

   struct enet_statistics stats;

   /* devices which this FRAD is slaved to */

   struct device     *master[CONFIG_DLCI_MAX];

   short             dlci[CONFIG_DLCI_MAX];

   struct frad_conf  config;

   int               configured;        /* has this device been configured */

   int               initialized;       /* mem_start, port, irq set ? */

   /* callback functions */

   int               (*activate)(struct device *, struct device *);

   int               (*deactivate)(struct device *, struct device *);

   int               (*assoc)(struct device *, struct device *);

   int               (*deassoc)(struct device *, struct device *);

   int               (*dlci_conf)(struct device *, struct device *, int get);

   /* fields that are used by the Sangoma SDLA cards */

   struct timer_list timer;

   int               type;              /* adapter type */

   int               state;             /* state of the S502/8 control latch */

   int               buffer;            /* current buffer for S508 firmware */

};

int register_frad(const char *name);

int unregister_frad(const char *name);

#endif __KERNEL__

#endif